I don't see why Gliese 581c should be written off as a potential habitat for extraterrestrial life simply because it does not rotate like the earth. Even if the side which always faces the red dwarf is infernally hot and the other side is deathly cold, there could easily be a temperate ring in between the two extremes where organisms could survive.
-Eric

I guess it depends on your definitions of "Earth-like" and "debatable." If the more pessimistic scenarios of climate change come to pass, I think the result will be "not Earth-like enough" for many people.

The International Astronomical Union meeting took place in Rio, but curiously the event was barely mentioned by the media here. I've seen an article about it in the Neue Zürcher Zeitung, and now this mention at the Economist, but the carioca press hasn't said a word about it - or, if it did, must have been in small letters.